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home/ags/node_modules/eslint-plugin-es-x/lib/rules/no-regexp-lookbehind-assertions.js

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+/**
+ * @author Toru Nagashima <https://github.com/mysticatea>
+ * See LICENSE file in root directory for full license.
+ */
+"use strict"
+
+const { defineRegExpHandler } = require("../util/define-regexp-handler")
+
+module.exports = {
+    meta: {
+        docs: {
+            description: "disallow RegExp lookbehind assertions.",
+            category: "ES2018",
+            recommended: false,
+            url: "http://eslint-community.github.io/eslint-plugin-es-x/rules/no-regexp-lookbehind-assertions.html",
+        },
+        fixable: null,
+        messages: {
+            forbidden: "ES2018 RegExp lookbehind assertions are forbidden.",
+        },
+        schema: [],
+        type: "problem",
+    },
+    create(context) {
+        return defineRegExpHandler(context, (node) => {
+            let found = false
+            return {
+                onLookaroundAssertionEnter(_start, kind) {
+                    if (kind === "lookbehind") {
+                        found = true
+                    }
+                },
+                onExit() {
+                    if (found) {
+                        context.report({ node, messageId: "forbidden" })
+                    }
+                },
+            }
+        })
+    },
+}